Sodium Carbonate → 1-Isopropylsulfonyl-2-amino-6-(1-(benzyl)-2-(methyl)-5-(2,4-difluorophenyl)-imidazol-4-yl)-benzimidazole

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Reaction Conditions

Reaction Steps

To a solution of 1-(benzyl)-4-(bromo)-5-(2,4-difluorophenyl)-2-(methyl)-imidazole (1.12 g, 3.08 mmol) in 8 mL DME add 1-isopropylsulfonyl-2-amino-benzimidazole-6-boronic acid (2.62 g, 9.25 mmol) (described in preparation 58). Add sodium carbonate (0.98 g, 9.25 mmol) dissolved in water (1 mL) and trans-dichlorobis(triphenylphosphine) palladium (II) (0.65 g, 0.93 mmol). Heat the mixture to 100° C. with stirring under nitrogen. After 3 hours cool the solution and filter over a pad of Celite and sodium sulfate. Purify the residue by radial chromatography eluting with 3% methanol in CH2Cl2 with a gradient to 10% methanol. Perform a second purification by radial chromatography eluting with 4% methanol in CH2Cl2 with a gradient to 6% methanol to yield 390 mg (24%) of the title compound as a yellow solid. MS(ES+): m/z=522.0 (M+H)+

Provenance & Evidence